Millstone-sharpening pick



UNITED STATES PATENT OFFICE.

JAMES T. WHITENER, OF TISHOMINGO, MISSISSIPPI, ASSIGNOR, BY MESNE ASSIGN- MENT S', OF ONE-HALF TO WILLIAM L. 'WHITENER, OF 'IISHOMINGO, MISSISSIPPI.

MILLSTONE-SHARPENING PICK.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed January 5, 1916, Serial No. 70,490. Renewed October 7, 1919. Serial No. 329,146.

To all whom it may concern:

Be it known that I, JAMES T.,VHITENER, a citizen of the United States, residing at Tishomingo, in the county of Tishomingo and State of Mississippi, have invented certain new and useful Improvements in Millstone-Sharpening Picks; and I do hereby declare the following to be a full, clear, and exact description of the invention, suchas will. enable others skilled in the art to which it appertains to make and use the same.

The invention relates to improvements in millstone sharpening picks.

The object of the present invention is to improve the construction of millstone sharpening picks and to provide a simple, practical and efficient tool of strong and durable construction equipped with means for securely holding a bit and of permitting the same to be readily adjusted and easily removed as required.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing Figure 1 is a perspective view of a millstone sharpening pick constructed in accordancewith this invention,

Fig. 2 is a longitudinal sectional view of the same,

Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 2.

Like numerals of reference designate corresponding parts in the several figures of the drawing.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention, the millstone sharpening pick comprises in its construction, a forwardly tapered casing 1 connected at a point intermediate of its ends to the outer end of a handle 2 and consisting of a bottom 3 and sides 4: which are provided at their outer longitudinal edges with inwardly extending flanges 5. The bottom 3 is preferably provided with a threaded opening 6 for the reception of the handle 2 which has its outer end 7 exteriorly threaded to engage the threaded opening 6 of the bottom of the casing. The sides I are tapered forwardly and the flanges 5 are inclined and are engaged by the inclined outer face of a wedge 8, and are spaced apart as clearly shown in- Figs. 1. and 3 of the drawing. The Wedge which has a flat lower face in parallelism with the bottom of the casing is adapted to clamp bit 9 against the said bottom 3 and the latter is provided with a rearwardly'extending portion 10 projecting beyond the side edges forming an extension for supporting 'ablock 11. The block 11 is secured by a rivet 12 or other suitable fastening device, to the upper or outer face of the extension 10 and it constitutes a stop for the wedge 8 and also an gagement with the bit by striking the block and extension 10 against a hard surface. The extension of the block which receives the rear portion of the wedge will support the wedge in spaced relation with the bottom of the casing when the bit is being changed or introduced into the casing. Also the wedge is confined in the casing by the block.

The bit preferably consists of a cross cut file but any other suitable form of bit may of course be employed. The cross cut file which is constructed of tempered material will be found especially adapted for surface work as the file-will scale just enough to keep it sharp. When the device is designed for furrowing millstones the bit may be given a short bevel like that of a cold chisel by placing it on an emery wheel. The casing is open at the inner or rear end to enable the wedge to be readily struck with a hammer or other tool for driving it tightly into engagement with the bit. The bit is adapted to be advanced as it is used or worn and the engaging surfaces of the file will enable it to be securely held by the wedge and any adjustment of the bit. At the same time the wedge may be readily disengaged from the bit by tapping the head of the pick against a hard surface.

hat is claimed is:

1. A tool of the class described including a forwardly tapered easing open at the front and back and provided at the rear end with an extension forming a continuation of the bottom of the casing, a handle connected with the casing between the ends thereof, a bit fitted fiat against the bottom of the casing, a wedge extending longitudinally of the casing and interposed between the bit and the top of the casing, and a stop consisting of a block rigidly secured to the extension of the casing and confining the wedge in the casing when the bit is either in or out of the same, said block being provided at the front with a fiat extension of substantially the same thickness as the bit and of a length to ex-' tend beneath the wedge when the latter is in engagement with the bit, said extension of the stop being also arranged to receive the wedge for supporting the same above the bottom of the casing when the bit is removed.

2. A tool of the class described including a forwardly tapered casing comprising a bottom, tapered sides, and inwardly extending flanges extending longitudinally of the sides and arranged at an angle to the bottom of the casing, said bottom being provided with a rear extension, a handle connected 30 with the casingbetween the ends thereof, a bit fitted flat against the bottom of the easing, a wedge extending longitudinally of the casing and interposed between the said flanges and the bit, and a stop consisting of 35 a block rigidly secured to the extension of the casing and confining the wedgeim the casing when the bit is either 111 or out of the same, said block being provided at thefront' with a flat extension of substantially the 40 same thickness as the bit and of a length to extend beneath the wedge when the latter is in engagement with the bit, said extension of the stop being also arranged to receive the wedg f Supporting the Same JAMES T. WHITENER. Witnesses d C. A. Prr'rsp J. H. BIOKERSTAFF. 

